Year	% of total labor force
1991	35.12267702982736
1992	35.166651447857205
1993	35.24483649762787
1994	35.33308062810581
1995	35.44872129291043
1996	35.588230370343595
1997	35.68658965839953
1998	35.44970170264949
1999	35.52140008423014
2000	35.58594433873952
2001	35.39071221788221
2002	35.31180003324866
2003	35.24982648181199
2004	35.21921277688242
2005	35.1575368691365
2006	35.10653295841261
2007	35.07743060092424
2008	34.78144291936117
2009	35.007914207868694
2010	34.91694826283786
2011	35.5850430668308
2012	36.10553408082354
2013	37.3533830190578
2014	37.94877326585021
2015	38.13867745913857
2016	38.36047609313892
2017	38.5893232065122
2018	38.69610688097316
2019	38.745438103592065
2020	38.73915268169596
2021	39.01517215279872
2022	38.89384464083492
2023	38.94691240093464